diff --git a/src/cfg.c b/src/cfg.c
index a199a07..48f8253 100644
--- a/src/cfg.c
+++ b/src/cfg.c
@@ -341,7 +341,7 @@ cfg_set_server_port(const char *port_str, const char **errstrp)
 		return (-1);
 	}
 
-	port = strtonum(port_str, 1, UINT16_MAX, &errstr);
+	port = (unsigned int)strtonum(port_str, 1, UINT16_MAX, &errstr);
 	if (errstr) {
 		if (errstrp)
 			*errstrp = errstr;
diff --git a/src/cfg_private.h b/src/cfg_private.h
index 2baf657..fe6ca97 100644
--- a/src/cfg_private.h
+++ b/src/cfg_private.h
@@ -141,7 +141,7 @@ struct cfg {
 		return (-1);				\
 	}						\
 							\
-	num = strtonum((s), 0, UINT_MAX, &errstr);	\
+	num = (unsigned int)strtonum((s), 0, UINT_MAX, &errstr); \
 	if (errstr) {					\
 		if ((e))				\
 			*(e) = errstr;			\
@@ -160,7 +160,7 @@ struct cfg {
 		return (-1);				\
 	}						\
 							\
-	num = strtonum((s), INT_MIN, INT_MAX, &errstr); \
+	num = (int)strtonum((s), INT_MIN, INT_MAX, &errstr); \
 	if (errstr) {					\
 		if ((e))				\
 			*(e) = errstr;			\